I think it's the fact that these new players probably aren't used to the game yet, and after deciding this game might be fun, they suddenly get hit- and can't do anything for 3/4 hours?
Wait, this game sucks suddenly, let's go find a different one
Why would Zen NOT want to help them out? Very few admins would, the fact she chose to is totally her prerogative. What's different between her stimming out some newbies and gangmates sending stims to people in hospital? All of AL is her gang, so to speak, so if she wants to stim someone out, fair play.
Thing is, if she started intervening in gang wars with experienced players, then obviously it's wrong. Here, she was just helping out a couple of new, inexperienced players that had the misfortune to be caught in the crossfire of high powered players, through no fault of her own. Her stimming these newbies out affected the powerplay at the top not at all, and I can't see a problem with that.